Scraper



- r2 Sheets-Sheet 2. W. DAVY.

1 SGRAPER.

(No Model.)

N0..514.,645; Patented Feb. 13, 1894.

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IIAMINGYON, c. c.

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UNITED STATES .l/VILLIAM DAVY, OF KENOSHA, JVISOONSIN.

SCRAPER.

SPECIFICATION forming part of Letters l atent No. 514,645, datedFebruary 13, 1894.

Application filed $eptemher 5, 1893. Serial No. 484,856- (ll'o model.)

To all whom it may concern.-

Be it known that 1, WILLIAM DAVY, acitizen of the United States,residing at Kenosha, in the county of Kenosha and State of Nisconsin,have invented a new and useful Improvement in Scrapers, of which thefollowing is a specification.

My invention relates to an improvement in the class of so-calledscrapers, the same being in the nature of scoops or buckets adapted toout and become filled with soil by drag ging them upon it in a manner tocause them to penetrate the same, and which are further adapted to behoisted and carried by machinery between the points of filling anddumping, and to be dumped of their contents by backward tilting.

My object is to provide a scraper which shall be especially serviceablefor sewer-excavation and which shall afiord a material improvement inthe class referred to in the way of details of construction andcombinations of parts, whereby, among other advantages, the device shallbe adapted to outreadily through very hard, as well as the softer, soil;to brealt up the'soil in filling, thus to adapt it to discharge the morereadily, and to be dumped automatically.

In the accompanying drawings-Figure 1 shows my improved scraper insideelevation. Fig. 2 is a plan view of the same. Fig. 3 is a section takenat the line 3 on Fig. 1 and viewed in the direction of the arrow. Fig.4: is a perspective view of a colter-detail. Fig. 5 is a sectional viewtaken partly at each of the lines 5 on Fig. 2 and viewed in thedirection of the arrow. Fig. 6 is a view in the nature of a diagram toillustrate the relation of the trip mechanism of the scraper, when aboutto be dumped, to the boom.

A is the body of the scraper comprising, preferably, a single piece ofsheet-steel bent to form sides 0" and a bottom 0", and open at itsforward and rear ends.

B is the back for the body-portion, having fastened to it the rearwardextending guiding handle q, and which is, in turn, fastened rigidly tothe side-bars p, 13 of the supporting which bars extend above the sidesr of the bodyA beyond the forward end thereof.

0 is the plow or cutter comprising a steel plate, bent to conform to thecross-section of the body A, inside of which it fits, being fastened atits side-portions 0 to the sides r of the body near its forward end,where said sides extend forward beyond the bottom rv so that the rearedge of the base 0 of the plow shall abut against the forward edge ofthe bottom 1*, being also thicker than the latter, the adjustment beingsuch as to render the junction flush on the lower surfaces of the parts7* and 0', and afford an offset 0 across the rear upper edge of thelatter. It will be noticed that the base 0' inclines downward andforward somewhat to give to the plow a tendency to penetrate the soil atits forward edge, where it is provided with teeth t, sharpened on theiredges; and the sidepieces 0 of the plow are also sharpened, byout-ward-beveling from their inner surfaces, along their forward edges,toward which they are caused to flare somewhat to extend laterallybeyond the width of the body-portion A to cut somewhat wider than thatwidth and thus induce a tendency the better to crowd the plowed soilinto the scraper.

D, D, are brackets of generally triangular shape pivotally fastened atone of their angles, as at or, to the opposite sides 0" and 0 of thebody-portion and plow; and to the upper rear angles of the brackets arefastened the forward ends of the sides 10, thelatter and theangle-brackets thus forming the frame on which the plow-carryingbody-portion is pivotally supported at 0;, near its forward end. I makethe pivotal-connection xadjustable to adapt the pivots to be set in anyone of a series of vertical holes 00, thereby to lower or raise theconnection at will according to desire in regulating the extent ofpenetration, by the draft, of the plow-teeth into the soil. The draft isapplied to a pulley n journaled in bearings n extending forward fromashaft m, with which they are pivotally connected at their rear ends,the shaft being adjustably fastened at its opposite ends in segmentalslots m provided in the forward portions of the angular brackets D, andaffording a medium for the regulation of the draft.

Between the framesides 19, near the transverse center of the body A, isa cross-bar Z, from which extends upward a hearing it hav ing journaledin it the suspension-pulley i; and the bearing it carries a rearwardextendingarm h terminating in. a vertical guidesocket h, in which isconfined a vertical spring-controlled plunger E. This plunger ispivotally connected, from its lower end, through the medium of acrank-arm g with a rock-shaft g journaledinbearings g, which projectbackward from the sides 19 of the frame, the rock-shaft carrying, nearits opposite ends, dogs f toengage catches f rigidly fastened in properposition to the inner surfaces of the sides r.

Fig. 3, and of somewhat similar shape in 1ongitudinal section, as shownin Fig. 5, being preferably hollow and provided with a flat base, atwhich it fits against the oifset 0 being fastened to the upper surfacesofthe bot: tom r and plow-base 0 to extend across the junction betweenthe two lengthwise of the center of the body-portion A nearly to theforward end of the central plow-tooth t. On the shaft m, near itsopposite ends, are fastened colters G, each being bent transversely ofits shank-portion sufficiently inward to bring its cutting foot-portione in line with the space between the central plow-tooth t and the toothflanking it. As means for rigidly holding the colters in the variouspositions of adjustment of the shaft on, I provide a series of recesses11 in. the rear edges of the shanks of the colters to admit rigid stopso in proper position on the brackets D.

, The operation of the device is as follows: It is suspended, in theusual or any suitable manner, to adapt it to be raised and lowered, onthe boom of a hoisting-machine (see Fig. 6), at its suspension-pulley i;and from the pulley n it is connected, through the medium of the cable(1, chain, or the like, with the winding mechanism of the machine in anysuitable or well-known manner. Thus the scraper is adapted, as usual, tobe lowered to the soil to be scooped and dragged along the same toloosen and fill itself therewith, and thereupon be hoisted and carriedto the point of dumping. In thus dragging the scraper, the advancecutting of the soil is performed by the colters, and the plow Othereafter finishes the loosening, while the dragging of the scrapercauses it to fill with the loosened soil, which is considerablybroken upor divided by the alternate arrangement of the colters and plow-teeth.In the scraper, however, the central divider F still further breaks upthe soil as it fills into the same, wherein it is in such a thoroughlybroken up condition that its discharge from the scraper is greatlyfacilitated. When the scraper has been filled, it is hoisted and causedto travel, by the dragging-mechanism, to the point at which it isdesired to discharge the contents. There the scraper is raised till theplunger E strikes the boom, and the concally re-engage the catches f andlock the body-portion A to the supporting frame.

WVhat I claim as new, and desire to secure by Letters Patent,is--

1. In ascraper, the combination of the bodyportion A having, at itsforward end, a plow 0 adapted to out along its forward vertical edgesand provided with teeth 25 on its base, colters Gr supported in advanceof the plow to alternate with said teeth, and a central dividing shoe Fon the bottom of the scraper, substantially as and for the purpose setforth.

2. In a scraper, the combination of the bodyportion A having, at itsforward end, a plow (3 formed with upright sharpened sides 0, flaringoutwardly toward their cutting edges, and a base 0 having teeth t,colters G supported in advance of the plow to alternate with said teeth,and a central dividingtshoe F on the bottom of the scraper,substantially as and for the purpose set forth.

3. In a scraper, the combination of the bodyportion A, a frame havingsidebars p carrying the back B and to which said body-portion is pivotednear its forward end, means by which to suspend the scraper to saidframe, and automatic dumpingmeans comprising pivotal dog and catchmechanism and a spring-plunger E connected with the dog and adapted tobe actuated, all substantially as and for the purpose set forth.

' 4. In a scraper, the combination of the body;

portion A having side-catchesf, and a plow O at its forward end, a framecomprising the sidebars 19, carrying the back 13, and the angle-bracketsD on which said body-portion is pivotally supported near its forwardend, colters Gadjustably supported on said brackets and a drag-pulley nconnected therewith, a suspension-pulley z in a bearing is extendingfrom the sides 19 and provided with a socket-bearing extension h, aspring-plunger E in said socket-bearing, and pivotal dogs f connectedwith the spring-plunger, the whole being constructed and arranged tooperate substantially as described.

WILLIAM DAVY.

In presence of M. J. FRosT, W. N. WILLIAMS.

